package com.atguigu.netty.websocket;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;

import java.time.LocalDateTime;

/**
 * @author: 叶子
 * @date: 2022/02/19 21:13
 **/
public class MyTextWebSocketFrameHandler extends SimpleChannelInboundHandler<TextWebSocketFrame> {
    //这里的TextWebSocketFrame类型，表示一个文本帧(frame)
    @Override
    protected void channelRead0(ChannelHandlerContext ctx, TextWebSocketFrame msg) throws Exception {
        System.out.println("服务器收到消息:" + msg.text());
//        回复消息
        ctx.channel().writeAndFlush(new TextWebSocketFrame("服务器时间：" + LocalDateTime.now() + "" +
                msg.text()));
    }

    //  当web客户端连接后，触发方法
    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
//        id表示唯一的值 LongText 是唯一的,ShortText不是唯一
        System.out.println("handlerAdded 被调用" + ctx.channel().id().asLongText());
        System.out.println("handlerAdded 被调用" + ctx.channel().id().asShortText());
    }

    @Override
    public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
        System.out.println("handlerRemove 被调用" + ctx.channel().id().asLongText());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        System.out.println("异常发生" + cause.getMessage());
        ctx.close();//关闭连接
    }
}